Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.7.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
shares in Millions, $ in Millions
1 Months Ended
Apr. 30, 2017
Feb. 21, 2017
Subsequent Event [Line Items]    
Share repurchase program authorized amount   $ 1,500.0
Subsequent Event [Member] | Open market purchases [Member]    
Subsequent Event [Line Items]    
Repurchase of common stock, shares 1.0  
Repurchase of common stock, value $ 57.9